<div id="drag_mode" style="position:absolute;
left:400px;top:400px;
overflow: hidden;
width:100px;height:100px;
border:1px solid red;">
    drag
</div>

<div id="drop_mode" style="position:absolute;left:600px;top:600px;width:110px;height:110px;
border:1px solid green;">
    drop
</div>
